Title :
Bandwidth enhancement of CFOA based inverting amplifier
Author :
Kamath, Dattaguru V. ; Ananda Mohan, P.V. ; GopalakrishnaPrabhu, K.
Author_Institution :
Dept. of E&C Eng., Manipal Univ., Manipal, India
Abstract :
In this paper, we present anactive compensation method using a voltage buffer to enhance the bandwidth of current feedback operational amplifier (CFOA) based finite gain inverting voltage amplifier for use as stand-alone amplifier. The use of feedback capacitor to this circuit for realizing Butterworth response is also considered. The proposed circuits require one additional CFOA/ capacitor. The effect of finite output impedance at z terminal, input resistance at x terminal, and current mirror pole of the CFOA are studied. The circuits considered have been simulated in PSPICE using a behavioral macro-model of the CFOA as well as that of a practical CFOA AD 844.
Keywords :
SPICE; buffer circuits; capacitors; compensation; current mirrors; feedback amplifiers; invertors; operational amplifiers; CFOA-capacitor; PSPICE; bandwidth anactive compensation method; bandwidth enhancement; behavioral macromodel; butterworth response; current feedback operational amplifier; current mirror pole; feedback capacitor; finite gain inverting voltage amplifier; finite output impedance; input resistance; practical CFOA AD 844; stand-alone amplifier; voltage buffer; x terminal; z terminal; Operational amplifiers; Active compensation; Current-feedback op-amp (CFOA); Passive compensation;
Conference_Titel :
Electronics and Communication Systems (ICECS), 2014 International Conference on
Conference_Location :
Coimbatore
Print_ISBN :
978-1-4799-2321-2
DOI :
10.1109/ECS.2014.6892763
